[v4,1/7] net/iavf: stop the PCI probe in DCF mode
diff mbox series

Message ID 20200326030346.32907-2-haiyue.wang@intel.com
State Superseded
Delegated to: xiaolong ye
Headers show
Series
  • add Intel DCF PMD support
Related show

Checks

Context Check Description
ci/Intel-compilation fail Compilation issues
ci/Performance-Testing fail build patch failure
ci/checkpatch success coding style OK

Commit Message

Wang, Haiyue March 26, 2020, 3:03 a.m. UTC
A new DCF PMD will be introduced, which runs on Intel VF hardware, and
it is a pure software design to control the advance functionality (such
as switch, ACL) for rest of the VFs.

So if the DCF (Device Config Function) mode is specified by the devarg
'cap=dcf', then it will stop the PCI probe in the iavf PMD.

Signed-off-by: Haiyue Wang <haiyue.wang@intel.com>
Reviewed-by: Xiaolong Ye <xiaolong.ye@intel.com>
---
 drivers/net/iavf/iavf_ethdev.c | 43 ++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

Comments

Wu, Jingjing March 26, 2020, 3:28 a.m. UTC | #1
-----Original Message-----
From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Haiyue Wang
Sent: Thursday, March 26, 2020 11:04 AM
To: dev@dpdk.org; Ye, Xiaolong <xiaolong.ye@intel.com>; Zhang, Qi Z <qi.z.zhang@intel.com>; Yang, Qiming <qiming.yang@intel.com>; Xing, Beilei <beilei.xing@intel.com>
Cc: Zhao1, Wei <wei.zhao1@intel.com>; Wang, Haiyue <haiyue.wang@intel.com>
Subject: [dpdk-dev] [PATCH v4 1/7] net/iavf: stop the PCI probe in DCF mode

A new DCF PMD will be introduced, which runs on Intel VF hardware, and it is a pure software design to control the advance functionality (such as switch, ACL) for rest of the VFs.

So if the DCF (Device Config Function) mode is specified by the devarg 'cap=dcf', then it will stop the PCI probe in the iavf PMD.

Signed-off-by: Haiyue Wang <haiyue.wang@intel.com>
Reviewed-by: Xiaolong Ye <xiaolong.ye@intel.com>


Acked-by: Jingjing Wu <jingjing.wu@intel.com>

Patch
diff mbox series

diff --git a/drivers/net/iavf/iavf_ethdev.c b/drivers/net/iavf/iavf_ethdev.c
index 34913f9c4..c0b95e169 100644
--- a/drivers/net/iavf/iavf_ethdev.c
+++ b/drivers/net/iavf/iavf_ethdev.c
@@ -1416,9 +1416,51 @@  iavf_dev_uninit(struct rte_eth_dev *dev)
 	return 0;
 }
 
+static int
+iavf_dcf_cap_check_handler(__rte_unused const char *key,
+			   const char *value, __rte_unused void *opaque)
+{
+	if (strcmp(value, "dcf"))
+		return -1;
+
+	return 0;
+}
+
+static int
+iavf_dcf_cap_selected(struct rte_devargs *devargs)
+{
+	struct rte_kvargs *kvlist;
+	const char *key = "cap";
+	int ret = 0;
+
+	if (devargs == NULL)
+		return 0;
+
+	kvlist = rte_kvargs_parse(devargs->args, NULL);
+	if (kvlist == NULL)
+		return 0;
+
+	if (!rte_kvargs_count(kvlist, key))
+		goto exit;
+
+	/* dcf capability selected when there's a key-value pair: cap=dcf */
+	if (rte_kvargs_process(kvlist, key,
+			       iavf_dcf_cap_check_handler, NULL) < 0)
+		goto exit;
+
+	ret = 1;
+
+exit:
+	rte_kvargs_free(kvlist);
+	return ret;
+}
+
 static int eth_iavf_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
 			     struct rte_pci_device *pci_dev)
 {
+	if (iavf_dcf_cap_selected(pci_dev->device.devargs))
+		return 1;
+
 	return rte_eth_dev_pci_generic_probe(pci_dev,
 		sizeof(struct iavf_adapter), iavf_dev_init);
 }
@@ -1439,6 +1481,7 @@  static struct rte_pci_driver rte_iavf_pmd = {
 RTE_PMD_REGISTER_PCI(net_iavf, rte_iavf_pmd);
 RTE_PMD_REGISTER_PCI_TABLE(net_iavf, pci_id_iavf_map);
 RTE_PMD_REGISTER_KMOD_DEP(net_iavf, "* igb_uio | vfio-pci");
+RTE_PMD_REGISTER_PARAM_STRING(net_iavf, "cap=dcf");
 RTE_INIT(iavf_init_log)
 {
 	iavf_logtype_init = rte_log_register("pmd.net.iavf.init");